Delta Air Lines plans to start charging basic economy passengers checked baggage fees on flights to Europe. The airline plans to charge $60 for the first bag and $100 for the second bag, beginning April 10 for tickets purchased Dec. 6 and beyond.

Delta and other major airlines have long allowed at least one free checked bag on flights to Europe. That policy will remain for other types of tickets, the airline said. Checked baggage fees have been in place on domestic flights since 2008.

WOW Air, Norwegian, and other low-cost carriers that have been adding a flurry of flights of cheap flights between the United States and Europe already charge passengers checked baggage fees.

Their model is similar to that of U.S. carriers Frontier, Spirit, and Allegiant, which tout bargain fares and charge for everything but transportation.

Basic economy fares were created to enable major airlines to match the discounter's fares and restrictions. Basic economy travelers generally don't get advance seat assignments and board last. American and United don't allow economy travelers a carry on that doesn't fit underneath the seat.

The hope is that passengers will see the restrictions and buy regular economy tickets. Delta, United, and American have said about half the passengers facing a choice between basic economy and regular economy will purchase the regular economy ticket.

The price difference between basic economy fares and regular economy varies by carrier, date, and route. On a Phoenix to Paris Delta flight in early June, the airline is charging $1,600 round trip in basic economy and $1,694 in regular economy. So passengers checking one bag would save very little with basic economy.

American and United Airlines are the other carriers offering basic economy tickets. American does not currently offer basic economy fares on flights to Europe.